
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>
    <a href="后代选择器.html">作业1</a>
</div>
<div>
    <a href="子选择器.html">作业2</a>
</div>
<div>
    <a href="导航栏2.html">作业3</a>
</div>
<div>
    <a href="案例.html">作业4</a>
</div>
<div>
    <a href="添加和移除类名效果.html">作业5</a>
</div>
<div>
    <a href="返回上一层.html">作业6</a>
</div>
<div>
    <a href="选择下面所有非指定的元素.html">作业7</a>
</div>
</body>
</html>